package com.xxx.filter;

import javax.servlet.*;
import javax.servlet.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


public class LoginFilter implements Filter {
    public void init(FilterConfig config) throws ServletException {
    }

    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException {

        HttpServletRequest req = (HttpServletRequest) request;
        String[] uris = {"/css/","/img/","/js/","/LS03_vuejs/index.html","/employee/"};
        String url = req.getRequestURL().toString();
        for (String s : uris) {
            if(url.contains(s)){
                //放行
                chain.doFilter(request, response);
                return;
            }
        }
        Long id = (Long) req.getSession().getAttribute("id");
        if (id != null ){
            chain.doFilter(request, response);
        }else {
            HttpServletResponse resp = (HttpServletResponse) response;
            resp.sendRedirect("/index.html");
        }

    }
}
